Arizona Crop Information Site logo
University of Arizona
Vegetable IPM Updates Archive
Cooperative Extension
Do You Know What It Is? (December 9, 2015)

The Veg IPM TEAM received the following specimen (picture) from a resident of the Foothills in Yuma AZ for identification. In our last update we asked you to email us with your answer to to receive a U of A Vegetable IPM hat from Dr. John Palumbo.
Mr. Dan Fox contacted us with the right answer. This is a gall produced by the Creosote Midge Gall (Asphondylia auripila) and was found in creosote plants at the Foothills in Yuma Arizona. Adult female midges oviposit (inserts eggs) into the part of the plant their species prefers, along with a fungal spore. The fungus induces the plant to produce the gall, and the fungus grows inside the gall, lining the inside of the egg chamber. The egg eventually hatches, and the larva feeds on the fungus. Very interesting insect! Congratulations Dan, you are the winner of A NEW HAT!!

Arizona Desert Ecology
Wildlife around Las Vegas


For questions or comments on any of the topics please contact Marco Pena at the Yuma Agricultural Center.
College of Agriculture, The University of Arizona, Tucson, AZ.

Home | Cotton | Veggies | Forages | Grains | Citrus | Crop x Crop
Insects | Diseases| Weeds | Pesticides | Economics | News | Weather | Research | Photos | Contacts | General Info.

Copyright © 2001 University of Arizona,
College of Agriculture and Life Sciences
Webmaster: Al Fournier (